The abdominal cavity.
That is called the diaphragm.
into the thoracis and abdominopelvic cavity.
The diaphragm is situated between the chest cavity and the abdominal cavity.
diaphragm
Arterial walls contain thick, muscular tissue to pump blood throughout the body. Veins have thinner walls.
The diaphragm.
The vaginal walls are the borders of the opening that leads from the outside of the body to the cervix. They are muscular and flexible.
The abdominal pelvic cavity has a muscular wall. There are no bone to protect the intestines so a thick wall helps. The muscles also allow for flexing at the waist.
The diaphragm is a dome shaped muscular membrane that separates the abdominal cavity from the thoracic cavity. Its contraction and relaxation serves an important role in respiration.
lateral walls of the oral cavity in the mouth are formed by what
do cappilaries have muscular walls